Blu Ray commercials on DVD

[INFRATOM]

Those Blu Ray commercials that come on dvd's looks very good In some cases looks better than the movie itself. It must have dvd encode to play on dvd. Can someone shed some light on this? Why they don't make the movie itself to play that good? Is the bit rate higher?

[yoda313]

Is the bit rate higher?

That is my first guess Since those are really short clips they could jack up the bitrate to make it look better.

As for the other part of your question the longer the film is the lower the bitrate is used generally. Depends also on how much bonus stuff they put on the disc and whether or not its a two disc set with extras on disc 2.

[jman98]

Keep in mind that those commercials were designed very carefully to have exactly the impact you report. They use only recent films, so the quality of the source is going to be very high (no expensive restoration needed like for films in the 50s and earlier). Since the clips are short they can use high bitrates as its only a few seconds per short clip.

Some years ago Sony pushed its Super Bit version of movies where they dropped all the extras and used the majority of dual layer disc space to encode the movie with as high a bit rate as they could. It sounded great, but I felt that they really were barely better than the original editions and the concept didn't take off.

[jagabo]

They over sharpen the blu-ray based clips but are careful to avoid scenes where over sharpening causes problems -- moire artifacts, stair step aliasing, etc.